Who is worth a trade?

In every draft there are a handful of players that are considered top tier. So limiting this to the first round and roughly the first half. What players combined with great team need would be worthy of trade possiblities. Who are these players? And what teams might want to trade up for them?
My players
3- QBs Stafford, Sanchez, Freeman
1- LB Curry
2- OT Smith, Monroe
1- DT Raji
1- DE Orakpo
WR ? if anyone would trade up for one
Did I leave anyone out?